Open Access Property
= to be distinguished clearly from Common Property Regimes.
"For Stevenson, a “private property, common property, open access trichotomy” ultimately exists. He compares these three forms in terms of group limitation and extraction limitation. Characteristic of the common property form is that both the group and the extent of resource use are limited by the individual members."
Source: STEVENSON, G.G: Common Property Economics. A General Theory and Land Use Applications. Cambridge. Cambridge University Press.1991, p.58
Stevenson compares these three forms in terms of group limitation and extraction limitation. 
3 Property Institutions:
- Limited: members only, unlimited extraction - Unlimited: open to anyone, unlimited extraction
Common Property: members only, extraction limited by rules
Private Property: one, extraction limited by individual decision